VOAVideo: Memorial Service in New York Honors Victims of 9/11 Attacks Ten years ago, the United States homeland came under attack. Islamic terrorists flew hijacked passenger planes into the two World Trade Center towers in New York and another into the Pentagon outside of Washington. A fourth plane crashed in Pennsylvania. Sunday, family members attended a 10-year anniversary memorial service, where they were the first to tour the 6.5-hectare site on the original World Trade Center location. VOA's Carolyn Presutti reports.